/Engine/Plugins/Runtime/NetworkPrediction/Source/NetworkPrediction/Public/NetworkPredictionWorldManager.h
This is the function that takes the config and current network state (role/connection) and subscribes to the appropriate internal NetworkPrediction services.
template<typename ModelDef> void ConfigureInstance ( [FNetworkPredictionID](API\Plugins\NetworkPrediction\FNetworkPredictionID) ID, const [FNetworkPredictionInstanceArchetype](API\Plugins\NetworkPrediction\FNetworkPredictionInstanceArchet-) & Archetype, const [FNetworkPredictionInstanceConfig](API\Plugins\NetworkPrediction\FNetworkPredictionInstanceConfig) & Config, [FReplicationProxySet](API\Plugins\NetworkPrediction\FReplicationProxySet) RepProxies, ENetRole Role, bool bHasNetConnection )